Nonmicrophonic socket



Al.. R. wANNi-:R

NoNMIcRoPHoNIc socx'r f 'April z5, 195o FiledY Nov. 26, 1945 1NVENTOR- Luuls P1. lllunnr April 25. 1950 R. wANNER 2,505,163

NoNMICkoPHoNIc SOCKET Filed Nov. ze, 1945 2 Sheets-Sheet 2` F D 27 i 12 i (D A 27a. 'lO- J2- l INVENT OR.

Louis Pn. llluhnel" l UNITED STATES PATENT OFFICE NONMICROP'HONIC SOCKET Louis R. wanner, Philadelphia, Pa., vassigner' to Hugh H.' Eby, Inc., a corporation of Pennsyl- Application November 26, 1945, Serial No. 630,845 4 Claims. y (Cl. 173-328) My invention relates to a socket for the reception of an electronic tube, and relates particularly to anon-microphonic miniature socket.

Heretofore, it has been customary to manufacture electronic tube receiving bases or sockets that are adapted to be mounted directly upon a chassis bysuitable means such as rivets, bolts and nuts, oreyelets, which chassis may be made of metal', or a synthetic resin. However, these prior art devices enable sound or shock to be transmitted from the chassis through the socket to the tube which sets up vibratory motion o f the tube elements and hence causes the tube to be microphonic.

Itis, therefore, an object of my invention to provide a socket or tube base for an electronic receiver or transmitter whereby mechanical vibration will be reduced to a minimum value.

It is another object of my invention to provide a base for an electronic tube device whereby physical vibrations from a loud speaker, or sound translator, or other mechanical vibrations will not be transmitted through the socket to the tube. r Another object of my invention is to provide an electronic tube socket which is physically cushioned from the chassis. A

Another object of my invention is to provide an` electronic tube socket which may be mounted either. above or below a chassis and remain cushioned from the chassis.

Another object of my invention is to provide an electronic tube socket which may be mounted either above or below the surface of a chassis simply by changing the location of some of the elements'of the socket. y

. Another object of my invention is to provide an electronic tube socket resiliently cushioned along airline support from the chassis.

'Other objects of my invention are to provide an improved device of the character described, that is'easily and economically produced, which issturdy in construction, and which is highly efflcient in operation. With the above and related objects in view, my invention is typified by the details of 'construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accompanying drawings in which:

Fig. 1 is a plan view of an electronic tube socket embodying my invention. 1

Fig. 2 is a fragmentary side elevational view looking from the line 2--2 of Fig. 1 showing the socket mounted above the surface of the chassis.

2 FiFigl. 3 is a view taken along the line 3-3 of Fig. 4 is a bottom view of the socket embodied in my invention mounted upon a chassis.

Fig. 5 is a fragmentary side elevational view of the socket embodying my invention when the socket is' positioned below the surface of the chassis.

Fig. 6 is an exploded view of the two resilient washers or rings, one of which is a locating washer or ring. j

Fig. 7 is a. fragmentary plan view showing the position of the resilient locating ring` together with the socket.

Fig. 8 is an enlarged fragmentary view showing the spacing of the cushioning washers from the socket housing whereby free floating action of the socket with respect to the chassis occurs.

Referring now in detail to the drawings of my invention wherein similar reference characters refer to similar parts, I show an electronic tube socket which is adapted to be mounted above (Figs. 2 and 3) or below (Fig. 5) fand to be completely cushioned from the chassis without any mechanical changes being made in any of the parts and wherein only the location of some of he elements is changed.

A chassis I0 made of any suitable material with suitable socket openings and slots therein for the reception of bendable tabs I2 which slots extend radially from the opening for the tube socket itself. The tabs i2, integrally formed with a metallic holding shell or casing Il, are for the purpose of holding the socket in position upon the chassis The electronic socket comprises a molded insulation, or a phenolic condensation base, generally designated as A, which has suitable metallic terminals, generally designated as B, extending from one end. The quantity, arrangement, and the construction of the terminals B is not the subject of this invention and is further described in my prior filed patent application Serial No. 589,286 now abandoned. Each of a plurality of openings I6 within the base A receive one end of each of the terminals B, and the end of each of the terminals B within the openings I6 is adapted to receive a pin which is upon the end of the electronic tube, the pins and their complementary terminals for the purpose of completing an electrical connection from the electrical terminal to a tube element.

The tube base A is substantially cylindrical and it has a horizontally extending central ridge i8 on the outer curved periphery thereof.

The ridge I8 has diametrically opposite cutouts 20 and 22 therethroughwhich are for the purpose of receiving locating key extensions 24 and 26 integrally formed with the ring 23-of a resilient washer or ring, generally designated as C. The resilient washer C is positioned on the upper edge I8a oi' the ridge I8 (Fig. 2) and a second resilient washer or ring, generally designated as D, is positioned between the ridge I8 and the top of the chassis I8. Each of the washers C and D. which may be made of rubber, soft ber, felt, paper, or any natural or synthetic soft material, normally is oi a radial thickness which is less than the distance between curved wall I9 of the base A and the inner curved wall I4a of the casing I4; and the radial thickness of thewashers is approximately twice the radial width of the ridge I8 from the wall I9 of the base A.

The transverse thickness of the washers C and D normally is less than the distance between the at surface of the ridge I8 and the surface of the chassis or the at surface I4b of the casing I4. Hence, when the washers C and D are mounted in position about the base A within the casing I4 and chassis, and the socket is mounted upon the upper surface of a chassis I0, Fig. 2, the lower edge of the ridge I8 of the base A will rest upon the washer D while the washer C will be freely floating away from the casing and the washer C will rest upon the upper surface I8a of the ridge I8. The edge I4c, defining the large opening through the casing I4 for the base A, is located to approximately meet the center of the washer C so that the washer C may be nearly in shearing action between the casing I4 and the ridge I8 of the base A. Hence, substantially a line contact is made between the socket base A and its cushion washer C.

It is to be observed that each of the key extensions 24 and 26 on the` ring 23 of the washer C extends equally on each transverse side of the ring, i. e., the extensions 24 and 26 serve the purpose of preventing the rotation of the washer l C with respect to the base A. `see Figs. 2 and 3.

The metallic casing I4 has suitable key openings I4d and I4e therein to permit the key extensions 24 and 26 of the washer C to intert therewith so that no relative turning motion may occur between the casing I4 and the washer C, but the two members may be pulled apart transverse of their radial diameter.

A central electrostatic shield, generally designated as F, passes through the base A and extends a suiclent distance away from the lower side of the base to permit a ground wire to be attached thereto.

In order to attach the socket to the underside I cushion as compared to a surface contact, and

a complete cushioning of the base A from the casing and the chassis occurs. This line cushioning enables the free rocking or floating of the base A with respect to the chassis.

With my invention, unwanted microphonic sounds which ordinarily may occur in the elecl trical circuit'because of the differential gain in the tube where microphonism occurs. are reduced to a minimum value.

The two insulating washers C and D may be made as a single washer or the ridge I8 may be made as a plurality of parts.

Although my invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and

l, the scope of the invention is to be determined of the chassis I0, no additional elements are inl serted nor are any parts altered, but the position of the washers C and D is exchanged, see Fig. 5, so that the washer D. is placed adjacent the chassis. The casing I4, also, is placed beneath the chassis I0 with its holding lugs I2 extending adjacent the upper surface of the chassis.

The washer D, also, is positioned to rest upon the edge I8a of the ridge I8 and away from the edge 21a of the large opening in the chassis I0, so that the washer D is freely floating upon the ridge I8. The base A is freely oating upon the resilient washer C, which is nestled upon the inner surface I4b of the casing I4, hence the socket base A is cushioned from both its casing andk thev chassis I0.

The extreme peripheral edge |811 of the ridge I8 engages the washer C so that there is a line as claimed.

I claim as my invention:

l. A nonmicrophonic electronic tube socket'assembly of the character described comprising, in combination, an electronic tube supporting base member having a plurality of .circumferentially spaced contact elements respectively adapted to frictionally receive the tube contact pins, lsaid base member being characterized by the provision of a circumferential rib disposed in a plane intermediate the opposite end surfaces of the base member, a mounting for the base member having a circular wall embracing said rib and an inturned annular flange disposed outwardly of the said circumferential rib, said rib and ange being complementally notched to conjointly provide a common keyway therebetween, and a pair .o f resilient, shock-absorbing annular elements embracing the body of said base member and disposed respectively upon opposite sides of said circumferential rib, said elements being each of a radial width approximately equal to the combined radial width of said rib and said inturned flange, one of said elements being provided with oppositely projecting lugs extending parallel to the axis of the socket assembly and adapted for projection respectively into the complemental notches of said keyway to resiliently key said base member and mounting against relative rotation.

2. In a nonmicrophonic socket assembly of the vcharacter dened in claim l wherein said rib and of keyways therebetween,- and wherein said lastmentioned shock-absorbing element is provided with a pair of diametrically opposed` keying lugs for respective projection into said `keyways.

3. In a nonmicrophonic socket assembly of the character defined in claim l wherein said circumferential rib and said inturned flange are disposed in parallel planes spaced vertically apart to accommodate therebetween said last-mentioned shock-absorbing element, and wherein said base member is reversible end for end relatively to said mounting to present one side or the other of said circumferential rib in engagement with said last-mentioned shock-absorbing element.

4. In a nonmicrophonic socket' assembly of the character defined in claim 1 wherein sad mounting for the base is in the form of a sheet metal stamping having at the circumferential edge thereof opposite its said inturned flange a plurality of bendable tabs for securingr said assembly upon a supporting chassis with said shock-absorbing elements in respective coml pressionbetweensaidehusisandtheeireum- Number terential rib of the base member and between 1,741,221 said rib and the inturned nange of the mount- 2,195,180 ing aforesaid. 2,259,157

LOUIS R. WANNER.. 5

nnrmNcEs crrEn Number The following references are of record in the 2331614 meer uns patent: gl

UNITED STATES PATENTS 1' 2511397 Number Name Date 1,672,255 Gorman June 5. 1928 8 l l Name DIM Bremer Dec. 31, 1929 Marzetti Mar. 26. 1940 Eby Oct. 14, 1941 FOREIGN PATENTS Country Date Great Britain May 14, 19.25 Great Britain July 9, 1925 Great Britain Nov. 12, 1925 Great Britain May 6, 1926 

